Tubular ball-mill.



No. 841,841.l PATENTED JAN. 22, 190.7.

N0.841,841. l PATLNTBD'JAN 22, 1907.

M. RABBL. 1

TUBULAR BALL MILL. APPLICATION FILED SEPT. 21. 1906.

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No. 841,841, PATBNTBD JAN. 2z, 1907.

M. F. ABBB. l

TUBULAB BALL MILL.

APPLIOATLON FILED SEPT. 21. 1906.

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W7 IMQ a das MAX F. ABBE, oF,

rArENT OFFICE.

NEW YORK, N. Y.

TUBULAF: BALL-MILL.

To all whom it 771,(1/ 1/ concern,.-

Be it known that I, MAX F. ABB, a citiven of the United States, residingat New York city, Manhattan, county and State of New York, have inventednew and useful Improvements in Tubular Ball-Mills, of which thefollowing is a specification.

This invention relates to a tubular ballmill that revolves on hollowtrunnions proj ecting outwardly from the heads of the mill and formingpart of the feeding device.

By my invention the construction of the mill is simplified, its strengthincreased, and its length reduced Without a corresponding reduction ofits capacity. v l g In the accompanying drawings, Figure 1 is a verticallongitudinal section of my im: proved mill; Fig. 2', a section through.the

A ingress-head on line 2 2, Fig. 1; Fig. 3, a

section through the egress-head on line' 3 3, Fig. 1; Fig. 4, a detailof the ingress-head liner; Fig. 5, a section on line 5 y5, Fig. 4; Fig.6, a detail of the egress-head liner when the mill is set fordry-grinding; Fig. 7, a section on line 7 =7-, Fig. 6; Fig. 8, alongitudinal section of a modification'of the egress-head; Fig. 9, asection on line 9 9, Fig. 8.; Fig. 10, a detail of the egress-headcover; Fig. 11, a section on line 11 11, Fig. 10; Fig. 12,`a detail of asecond egress-head cover; and Fig. 13, a section o n line 13 13, Fig.1.2.

The ingress-head of the mill is composed of three integral parts-namely,a trunnion 20, a flanged end plate' 21, and a feed-spiral jor conveyer22. The trunnion 2O is ]our naled in a support 23 and has a flaring`bore 24, into which enters Jfeed -pipe 25.. The flanged plate 2lconstituting the head proper is provided with an inner partition 26,forming a feed-chamber 27, that communicates with the bore 24 oftrunnion 20.` From the inner side of plate'26 extends the integralfeed-spiral 22,' flanked by an integralannular plate 28. Chamber 27-communicates with conveyer 22 through a number of peri heral openings29 in partition 26, three o such openings being shown, Fig. 2. Thelnnermost convolute 30 of conveyer 22 is flaring, so as to form acentral discharge-funnel 31.

The ingress-head constructed as described` is so bolted to thecylindrical shell or body 32 of the mill that partition 26 closesagainst the shell 32, while conveyer 22, with its plate Specification ofLetters Patent. Application filed September 21, 1906. Serial No.335,557.

28, projects into the same. The means for Patented Jan. 22, 1907. l

attaching the head to the shell consist of a flanged ring 33, fast onthe shell and to which the flanged plate 21 of the head is bolted, as at34.

To the inner face of the head are secured aA number of abuttingsector-shaped liners 35, Figs'. 4 and 5, the inner beveled edges ofWhichare engaged by an undercut kinwardlyextending annular flange 36 ofplate28. At their outer ends the liners bear against the tubular lining37 of shell 32, so that in this waythe liners are securely held inposition. The egress-head of the mill is constructed in substantialconformity with the ingresshead. Thus the hollow trunnion 38 is madeintegral with aanged plate 39, carrving the spirals of the conveyer 40,the latter being in turn flanked by the inner plate 41. The trunnion 38is journaled in the support 42 and communicates with the innermostilaring convolute of conveyer 40.

The egress-headv is attached to shell 32 by means of bolts 43, engaginga flanged ring 44, fast on the shell. The inner plate. 41 of the headhas the undercut flange 45, that overlaps the beveled inner edges of thesector-shaped liners 46. Alined openings 47 48 in rlates 41 and 39,respectively, are adapted to e closed by covers 49 and 50, connected by'a screw-bolt 51.

In dry-grinding, Figs. 1-7, the interior of shell 32'communicates withthe outer convolute of conveyer by means of a series of peripheral slits52 in plate 41, alined with corresponding slits 53` in linersv 46.During the normal operation ofthe millthe material l robe ground passesfromfeed-pipe 25 through hollow trunnion 20,v chamber `27, and openings29 to conveyer 22, shell 32.

The material reduced by the pebbles 54 passes through openings 53 52 toconveyer 40 to be thence discharged from hollow trunnion 38. When-thepebbles are to be vremoved or the mill is to be emptied entirely,

cover 49 is opened, so that the contents ofthe that carries it into millwill be fed out' of shell 32 by conveyer 40.

For wet-grinding, Figs. 8-13, the peripheral openings in plate 441 arereplaced by a central opening -55. This opening is protected by a grateor erforated plate 5,6 and discharges the pulp through pipe 57, havingcock 58, by means of which the. outflow is regulated. If the :millv isto be emptied oi its pulpy contents, cover 49 is removed and replaced bya cover 59, Fig. 12, having openings that permit the passage of the1kpulp, but prevent the passage of the peb les. As shown, cover 59 hasopenings 6()VJ and mutilated or ilat sides 61, so that segmentaldischarge-orices are formed at the top and.

bottom of the cover.

Itwill be seen that in both heads of the mill the flanged plates'forming the heads propell are made integral with the hollow trunnions.So also is each head provided' with an integral spiral thread, whichserves the double purpose of constituting a reinforcing-rib and offorming a conveyer for the material fed into o1' out of the mill. Inthis way the construction of the mill is simplified, while its strengthis increased. Furthermore, the waste space heretofore formed by thereinforcing-ribs of the heads is utilized for the feeding device, sothat the lengthof the mill is eorrespondinglyreduced without diminishingits capacity.

1. In altubular ball-mill, a head composed of a flanged end plate, anintegral hollow trunnion extending outwardly therefrom, a spiralconveyer extending inwardly therefrom, an inner plate having a beveledange, and beveled sector-shaped liners engaging `said flange,substantially as specified.

tan, New York, this th day of September,

MAY F. ABBE. Witnesses:

FRANK v. BRIESEN, W rLLIAM SCHULZ.

